25729233321 has 48 divisors (see below), whose sum is σ = 39819737088. Its totient is φ = 14652422400.

The previous prime is 25729233317. The next prime is 25729233379. The reversal of 25729233321 is 12333292752.

It is not a de Polignac number, because 25729233321 - 2² = 25729233317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25729233321.

It is not an unprimeable number, because it can be changed into a prime (25729233221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7084176 + ... + 7087806.

It is an arithmetic number, because the mean of its divisors is an integer number (829577856).

Almost surely, 2^25729233321 is an apocalyptic number.

It is an amenable number.

25729233321 is a deficient number, since it is larger than the sum of its proper divisors (14090503767).

25729233321 is a wasteful number, since it uses less digits than its factorization.

25729233321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4422 (or 4405 counting only the distinct ones).

The product of its digits is 136080, while the sum is 39.

The spelling of 25729233321 in words is "twenty-five billion, seven hundred twenty-nine million, two hundred thirty-three thousand, three hundred twenty-one".